• ADUM1400: maximum input rise time & input/output protection

    We have started a new project and decided to use Analog Devices digital
    isolators instead of opto-couplers. But we have some doubts. I have a few
    technical questions concerning ADUM1400 digital isolator.

    1- In data sheet, a maximum…
  • ADuM1400 VDD2-GND2 voltages when VDD2 is NOT supplied

    My customer reported as follows. Would you teach me what happened inside ADuM1400.

    He didn't mount side2 PINs

    He supplied 3.3V between VDD1 and GND1.

    when he measured the voltage between VDD2 and GND2, it was 0.62V

    I believe the circuit in side1…

  • ADUM1400 external RF field and magnetic field immunity ?

    Hallo,

    can you say me the max. value of external RF field and magnetic field immunity for error-free operation?

    Thanks

  • 关于ADuM1400的驱动能力问题

    请问ADuM1400的驱动能力如何?例如用于SPI总线隔离,输出端可否同时驱动多个具有SPI接口的器件?或者说能驱动能力取决于什么?

  • ADuM3400和ADuM1400的ESD耐压等级分别为多少!

    如题所示,ADuM3400相对于ADuM1400进行了ESD增强,但增强后的ESD能力能够达到什么等级,相关手册中并未给出。

  • ADUM1400 磁耦隔离芯片断电瞬间输出不稳定

    你好,在一个单片机控制H桥驱动芯片电路中,我采用了ADUM1400 磁耦隔离芯片,芯片输出输出都增加了下拉(电机高电平有效)。ADuM采用双电源供电,VE2引脚已经拉高。在使用过程中发现,当系统上电 或者断电的时候ADuM1400 输出端出现 不稳定脉冲信号,导致电机误动作。当ADuM1400 输入端 断路 (无电平输入,但保持低电平下拉)的时候,ADuM1400仍然出现不稳定脉冲信号,导致电机误动作!

    请贵司工程师协助解决!!谢谢!!

  • 买到一批有问题的ADuM1400,我这样测试可不可以?

    ADUM1400应该是个很简单的芯片,但是遇到一批有问题的,焊在产品上产品不正常

    我测了几个好像整批有问题

    我这样做初步测试可以判断是有问题的吧?

    连接2和8,连接15和9,即输入输出的两个gnd,

    输入5V后,发现输出空载时为0.6V,加5k电阻后为0.2V 我想这就不用隔离信号了,并且也没有信号输出。

    同样我用的ADUM1200 输入5V后输出也不对。

  • ADuM1400 在上电或者掉电瞬间输出状态不稳定

    你好,在一个单片机控制H桥驱动芯片电路中,我采用了ADUM1400 磁耦隔离芯片,芯片输出输出都增加了下拉(电机高电平有效)。ADuM采用双电源供电,VE2引脚已经拉高。在使用过程中发现,当系统上电 或者断电的时候ADuM1400 输出端出现 不稳定脉冲信号,导致电机误动作。当ADuM1400 输入端 断路 (无电平输入,但保持低电平下拉)的时候,ADuM1400仍然出现不稳定脉冲信号,导致电机误动作!

    请贵司工程师协助解决!!谢谢!!

  • ADuM: Internal overvoltage protection

    I want to use the ADUM1400 device with 5V / 3,3V supply. To protect the device
    from too high input voltages, we wonder if the ADUM1400 (and other ADUM's) has
    internal clamping diodes for this purpose ?

     

    The ADuM1400 has ESD diodes…
  • ADUM140x failure mode (by EOS, maybe)

    Hello.

    A ADUM1400 has failed.

    Regardless of input voltage, only one channel outputs high level.

    The other three channels are operating normally.

    I suspect the cause is that the input voltage has exceeded the absolute maximum rating or ESD.

    Does ADUM1400…